Space-time interaction

R δ

Rank of R δ

RW1 for γ

RW2 for γ

Type I

I s I t

I T

I T

Type II

I s R t

I ( T 1 )

I ( T 2 )

Type III

R s I t

( I 1 ) T

( I 1 ) T

Type IV

R s R t

( I 1 ) ( T 1 )

( I 1 ) ( T 2 )